Is it possible to travel faster than the speed of light? A recent experiment appeared to show just that. This video breaks ...

Add Yahoo as a preferred source to see more of our stories on Google. A new review tightens limits on whether light changes speed in deep space, sharpening one of physics’ most important tests.

Can darkness really travel faster than light? A surprising new physics experiment suggests it can—at least in a very unusual ...

A universe with half-speed light might never produce New Scientist readers capable of posing this question, notes one reader ...

All light that we see consists of electromagnetic waves, which travel at the ultimate speed limit of the universe: the speed ...

In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley failed to measure the speed of Earth by comparing the speed of light in ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. An artist’s impression of ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still daring to test it. Some theories of quantum gravity suggest light might ...

On one hand, the speed of light is just a number: 299,792,458 meters per second. And on the other, it’s one of the most important constants that appears in nature and defines the relationship of ...

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